package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 分类业务层
 */
@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

  @Autowired
  private CategoryMapper categoryMapper;
  @Autowired
  private DishMapper dishMapper;
  @Autowired
  private SetmealMapper setmealMapper;

  /**
   * 新增分类
   * @param categoryDTO
   */
  public void save(CategoryDTO categoryDTO) {
    Category category = new Category();
    //属性拷贝
    BeanUtils.copyProperties(categoryDTO, category);

    //分类状态默认为禁用状态0
    category.setStatus(StatusConstant.DISABLE);

    // 通过AutoFillAspect切面已经给公共属性赋值了
    //设置创建时间、修改时间、创建人、修改人
    /*category.setCreateTime(LocalDateTime.now());
    category.setUpdateTime(LocalDateTime.now());
    category.setCreateUser(BaseContext.getCurrentId());
    category.setUpdateUser(BaseContext.getCurrentId());*/

    categoryMapper.insert(category);
  }

  /**
   * 分页查询
   * @param categoryPageQueryDTO
   * @return
   */
  public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
    PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
    //下一条sql进行分页，自动加入limit关键字分页
    Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
    return new PageResult(page.getTotal(), page.getResult());
  }

  /**
   * 根据id删除分类
   * @param id
   */
  public void deleteById(Long id) {
    //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
    Integer count = dishMapper.countByCategoryId(id);
    if (count > 0) {
      //当前分类下有菜品，不能删除
      throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
    }

    //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
    count = setmealMapper.countByCategoryId(id);
    if (count > 0) {
      //当前分类下有菜品，不能删除
      throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
    }

    //删除分类数据
    categoryMapper.deleteById(id);
  }

  /**
   * 修改分类
   * @param categoryDTO
   */
  public void update(CategoryDTO categoryDTO) {
    Category category = new Category();
    BeanUtils.copyProperties(categoryDTO, category);

    // 通过AutoFillAspect切面已经给公共属性赋值了
    //设置修改时间、修改人
    /*category.setUpdateTime(LocalDateTime.now());
    category.setUpdateUser(BaseContext.getCurrentId());*/

    categoryMapper.update(category);
  }

  /**
   * 启用、禁用分类
   *
   * @param status
   * @param id
   */
  public void startOrStop(Integer status, Long id) {
    Category category = Category.builder()
      .id(id)
      .status(status)
      .updateTime(LocalDateTime.now())
      .updateUser(BaseContext.getCurrentId())
      .build();
    categoryMapper.update(category);
  }

  /**
   * 根据类型查询分类
   *
   * @param type
   * @return
   */
  public List<Category> list(Integer type) {
    return categoryMapper.list(type);
  }
}
